@media screen and (max-width: 48rem) {
  body {
    min-width: 18.75rem;
    min-height: 31vh;
  }
  .moNavBtnHide {
    display: none;
  }
  header {
    width: 100%;
    box-sizing: border-box;
  }
  header nav {
    box-sizing: border-box;
    width: 100%;
  }
  header .nav_box {
    width: 100%;
    box-sizing: border-box;
  }
  main {
    width: 100%;
    display: block;
    min-height: 22vh;
    box-sizing: border-box;
  }
  footer {
    width: 100%;
    box-sizing: border-box;
  }
  .bulletin {
    height: auto;
    width: 100%;
    margin: 0 auto;
    background-color: #fff;
  }
  .bulletin .bulletin_left {
    width: 100%;
  }
  .bulletin .bulletin_left h2 {
    margin-top: 5%;
    text-align: center;
    height: 1.125rem;
    font-family: SourceHanSansSC;
    font-weight: 500;
    font-size: 1.125rem;
    color: #333333;
    line-height: 1.125rem;
  }
  .bulletin .bulletin_left h6 {
    margin-top: 5%;
    text-align: center;
    height: 0.625rem;
    font-family: SourceHanSansSC;
    font-weight: 400;
    font-size: 0.5625rem;
    color: #999999;
    line-height: 0.625rem;
  }
  .bulletin .bulletin_left hr {
    height: 0.0625rem;
    margin-top: 5%;
    background: #DCDCDC;
    opacity: 0.11;
  }
  .bulletin .bulletin_left p {
    margin: 0 auto;
    margin-top: 5%;
    height: auto;
    width: 80%;
    font-family: SourceHanSansSC;
    font-weight: 300;
    font-size: 0.75rem;
    color: #666666;
    line-height: 0.875rem;
    text-indent: 2em;
  }
  .bulletin .bulletin_left .bulletin_img {
    width: 80%;
    height: 12.5rem;
    background: #02A0E7;
    margin: 0 auto;
    margin-top: 4%;
  }
  .bulletin .bulletin_right {
    width: 80%;
    height: auto;
    margin: 0 auto;
  }
  .bulletin .bulletin_right h3 {
    margin-top: 5%;
    width: 5rem;
    height: 1.3125rem;
    font-family: SourceHanSansSC;
    font-weight: 500;
    font-size: 0.875rem;
    color: #333333;
    line-height: 1.3125rem;
  }
  .bulletin .bulletin_right hr {
    width: 3.4375rem;
    height: 0.125rem;
    background: #404BDB;
    margin-top: 2%;
  }
  .bulletin .bulletin_right div {
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    margin-bottom: 2%;
  }
  .bulletin .bulletin_right div img {
    margin-top: 8%;
    display: inline-block;
    width: 40%;
    height: 6.25rem;
    background-color: #02A0E7;
  }
  .bulletin .bulletin_right div article {
    width: 50%;
  }
  .bulletin .bulletin_right div article h6 {
    width: 60%;
    margin-top: 18%;
    font-family: SourceHanSansSC;
    font-weight: 500;
    font-size: 0.75rem;
    color: #333333;
    line-height: 0.875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .bulletin .bulletin_right div article p {
    margin-top: 5%;
    font-family: SourceHanSansSC;
    font-weight: 300;
    font-size: 0.5rem;
    color: #666666;
    line-height: 0.875rem;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 5%;
    -webkit-line-clamp: 3;
    text-indent: 2em;
  }
}
@media screen and (min-width: 48.0625rem) {
  body {
    min-width: 75.0625rem;
  }
  main {
    width: 100%;
    height: 100%;
    min-height: 21vh;
  }
  .bulletin_box {
    width: 100%;
    margin: 0 auto;
  }
  .bulletin_deatils_box {
    width: 62.6%;
    margin: 0 auto;
    padding-bottom: 5rem;
  }
  .bulletin {
    height: auto;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    background-color: #fff;
    margin-top: 2.5rem;
  }
  .bulletin .bulletin_left {
    width: 43.875rem;
  }
  .bulletin .bulletin_left h2 {
    margin-top: 10%;
    text-align: center;
    height: 1.625rem;
    font-family: SourceHanSansSC;
    font-weight: 500;
    font-size: 1.625rem;
    color: #333333;
    line-height: 1.75rem;
  }
  .bulletin .bulletin_left h6 {
    margin-top: 10%;
    text-align: center;
    height: 0.9375rem;
    font-family: SourceHanSansSC;
    font-weight: 400;
    font-size: 0.875rem;
    color: #999999;
    line-height: 1.3125rem;
  }
  .bulletin .bulletin_left hr {
    height: 0.0625rem;
    margin-top: 10%;
    background: #DCDCDC;
    opacity: 0.11;
  }
  .bulletin .bulletin_left p {
    margin-top: 5%;
    height: auto;
    font-family: SourceHanSansSC;
    font-weight: 300;
    font-size: 1rem;
    color: #666666;
    line-height: 1.875rem;
    text-indent: 2em;
  }
  .bulletin .bulletin_left .bulletin_img {
    width: 100%;
    height: 12.5rem;
    background: #02A0E7;
    margin-top: 8%;
  }
  .bulletin .bulletin_right {
    width: 23.125rem;
    height: auto;
  }
  .bulletin .bulletin_right h3 {
    margin-top: 22%;
    width: 5rem;
    height: 1.3125rem;
    font-family: SourceHanSansSC;
    font-weight: 500;
    font-size: 1.25rem;
    color: #333333;
    line-height: 1.3125rem;
  }
  .bulletin .bulletin_right hr {
    width: 4.8125rem;
    height: 0.125rem;
    background: #404BDB;
    margin-top: 1.125rem;
  }
  .bulletin .bulletin_right div {
    margin: 0 auto;
  }
  .bulletin .bulletin_right div img {
    margin-top: 8%;
    display: inline-block;
    width: 100%;
    height: 9.375rem;
    background-color: #02A0E7;
  }
  .bulletin .bulletin_right div h6 {
    margin-top: 8%;
    max-width: 18rem;
    height: 1.3125rem;
    font-family: SourceHanSansSC;
    font-weight: 500;
    font-size: 1.125rem;
    color: #333333;
    line-height: 1.3125rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .bulletin .bulletin_right div p {
    margin-top: 5%;
    max-width: 23.125rem;
    font-family: SourceHanSansSC;
    font-weight: 300;
    font-size: 0.875rem;
    color: #666666;
    line-height: 1.5rem;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 5%;
    -webkit-line-clamp: 2;
  }
}